Kai Mak
About Kai Mak
Kai Mak is based in San Francisco. A video from the Venture with Grace series identifies him as CRO at Together AI, an AI infrastructure company. His LinkedIn profile lists Together AI as his current experience and the UC Berkeley Haas School of Business under education. It lists sales management and business development contract negotiation among his specialties.
His public posts focus on go-to-market work and on how AI agents may change software. He has also shared commentary on the gap between open and closed-source AI models.
The public record on Kai's angel investing is thin. The one investment he has announced himself is Ploy, which launched in June 2026. On LinkedIn he said he was an early investor, and he wrote that he had enjoyed working with its founder, Bryant Chou. He has not published a portfolio list, fund details or check sizes that we could find. Other people named Kai Mak or similar names turned up in search, and we did not use them.
Ploy is an AI growth platform founded by Bryant Chou, a Webflow co-founder and its former CTO. It builds AI agents that design pages, write copy, run campaigns and sync data to the CRM. On June 17, 2026, Ploy launched out of stealth with a $27M seed round led by First Round Capital and Y Combinator. Kai appears on the Lounge deals desk for this round. The round announcements we found do not list his check size.
Kai has not publicly stated a stage, sector or geography focus, or a check size. His one confirmed investment is a seed-stage AI company in the go-to-market and marketing software space. His day job is in AI infrastructure sales. Founders building AI products with a clear sales motion may find that experience relevant, but that is an inference and not something he has stated.
- Ploy: AI growth platform that runs a company's marketing system and website. Kai says he was an early investor, and it announced a $27M seed in June 2026.
Investing activity
Kai Mak appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $27M. The rounds are mostly Seed, with a median round size of $27M. The most recent is Ploy (Seed, $27M, Jun 2026).
Kai Mak most often invests alongside Ullas Naik, First Round Capital, Y Combinator and Hyphen Capital, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Kai Mak
Who is Kai Mak?
Kai Mak is the Chief Revenue Officer at Together AI in San Francisco. He is also an angel investor in AI startups.
Has Kai Mak invested in Ploy?
Yes. He wrote on LinkedIn that he was an early investor in Ploy. Ploy announced a $27M seed round on June 17, 2026, led by First Round Capital and Y Combinator.
What is Kai Mak's angel check size?
He has not made his check size public, and none of the Ploy announcements we found state it.
What stage does Kai Mak invest in?
He has not stated a stage focus. His one confirmed public investment is a seed-stage AI company.
How can founders contact Kai Mak?
He is active on LinkedIn at linkedin.com/in/kaimaksf. We found no personal website and no X account that we could confirm.
Is Kai Mak an angel investor?
Yes. Kai Mak invests personally as an angel.
What AI companies has Kai Mak invested in?
Kai Mak's AI investments include Ploy. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Kai Mak invest at?
In the rounds tracked on Lounge, Kai Mak has invested at Seed, with a median round of $27M.
Who does Kai Mak co-invest with?
Kai Mak's most frequent co-investors on Lounge are Ullas Naik (1 deal), First Round Capital (1 deal), Y Combinator (1 deal), Hyphen Capital (1 deal) and Lenny Rachitsky (1 deal).
How can founders reach Kai Mak?
Founders on Lounge can see Kai Mak's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Kai Mak to their Investor Pipeline to track the conversation.